Homogeneous thick film (0.10mm) of high dielectric K0.05Ti0.02Ni0.93O; abbreviated as KTNO/polyvinylidene fluoride (PVDF) composite has been prepared by hot-molding technique. The frequency and temperature dependent dielectric behavior of this composite has been studied by varying the KTNO volume fraction (fKTNO). Near the percolation threshold (fKTNO=0.40), a large enhancement of effective dielectric permittivity (εeff400 which is 40 times higher than that of pure PVDF) with low loss (0.20 at 1 kHz) is observed. The experimental εeff data have been fitted with different theoretical models and found to follow percolation theory successfully. Such a high εeff and low loss flexible dielectric material appears to be suitable for technological applications.

1.
R. E.
Newnham
,
Annu. Rev. Mater. Sci.
16
,
47
(
1986
).
2.
Q. M.
Zhang
,
H. F.
Li
,
M.
Poh
,
X.
Feng
,
Z. Y.
Cheng
,
H. S.
Xu
, and
C.
Huang
,
Nature (London)
419
,
284
(
2002
).
3.
Z. Y.
Cheng
and
Q.
Zhang
,
Mater. Res. Bull.
33
,
183
(
2008
).
4.
Y. B.
Cohen
and
Q.
Zhang
,
Mater. Res. Bull.
33
,
173
(
2008
).
5.
Ferroelectric Polymer & Ceramic-Polymer Composites
, edited by
D. K.
Das-Gupta
(
Trans Tech
,
Aedermannsdorf, Switzerland
,
1994
).
6.
C. C.
Homes
,
T.
Vogt
,
S. M.
Shapiro
,
S.
Wakimoto
, and
A. P.
Ramirez
,
Science
293
,
673
(
2001
).
7.
J. B.
Wu
,
C. W.
Nan
,
Y. H.
Lin
, and
Y.
Deng
,
Phys. Rev. Lett.
89
,
217601
(
2002
).
8.
S.
Sarkar
,
P. K.
Jana
,
B. K.
Chaudhuri
, and
H.
Sakata
,
Appl. Phys. Lett.
89
,
212905
(
2006
).
9.
Z. M.
Dang
,
J. B.
Wu
,
L. Z.
Fan
, and
C. W.
Nan
,
Chem. Phys. Lett.
376
,
389
(
2003
).
10.
Z. M.
Dang
,
L. Z.
Fan
,
Y.
Shen
, and
C. W.
Nan
,
Chem. Phys. Lett.
369
,
95
(
2003
).
11.
P. K.
Jana
,
S.
Sarkar
, and
B. K.
Chaudhuri
,
Appl. Phys. Lett.
88
,
182901
(
2006
).
12.
M.
Arbatti
,
X.
Shan
, and
Z. Y.
Cheng
,
Adv. Mater.
19
,
1369
(
2007
).
13.
A. L.
Efros
and
B. I.
Shklovskii
,
Phys. Status Solidi B
76
,
475
(
1976
).
14.
D. J.
Bergman
and
Y.
Imry
,
Phys. Rev. Lett.
39
,
1222
(
1977
).
16.
D. M.
Grannan
,
J. C.
Garland
, and
D. B.
Tanner
,
Phys. Rev. Lett.
46
,
375
(
1981
).
17.
Y.
Deng
,
Y.
Zhang
,
Y.
Xiang
,
G.
Wang
, and
H.
Xu
,
J. Mater. Chem.
19
,
2058
(
2009
).
18.
Z. M.
Dang
,
H. Y.
Wang
, and
H. P.
Xu
,
Appl. Phys. Lett.
89
,
112902
(
2006
).
19.
Y.
Bai
,
Z. Y.
Cheng
,
V.
Bharti
,
H. S.
Xu
, and
Q. M.
Zhang
,
Appl. Phys. Lett.
76
,
3804
(
2000
).
20.
D. A. G.
Bruggeman
,
Ann. Phys.
24
,
636
(
1935
).
21.
T.
Yamada
,
T.
Ueda
, and
T.
Kitayama
,
J. Appl. Phys.
53
,
4328
(
1982
).
22.
H. S.
Nalwa
,
Ferroelectric Polymers
(
Marcel Dekker
,
New York
,
1995
), Chap. 11.
23.
H.
Banno
and
K.
Ogura
,
Ferroelectrics
95
,
111
(
1989
).
24.
Y.
Daben
,
Ferroelectrics
101
,
291
(
1990
).
25.
H. L. W.
Chan
,
M. C.
Cheung
, and
C. L.
Choy
,
Ferroelectrics
224
,
113
(
1999
).
26.
C.
Chiteme
and
D. S.
Mclachlan
,
Physica B
279
,
69
(
2000
).
27.
S. H.
Xie
,
Y. Y.
Liu
, and
J. Y.
Li
,
Appl. Phys. Lett.
92
,
243121
(
2008
).
28.
R.
Gregorio
, Jr.
,
M.
Cestari
, and
F. E.
Bernardino
,
J. Mater. Sci.
31
,
2925
(
1996
).
29.
Z. M.
Dang
,
H. P.
Xu
, and
H. Y.
Wang
,
Appl. Phys. Lett.
90
,
012901
(
2007
).
30.
P. K.
Jana
,
S.
Sarkar
,
S.
Karmakar
, and
B. K.
Chaudhuri
,
J. Appl. Phys.
102
,
084105
(
2007
).
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